1. Hold your breath and test yourself.
After taking a deep breath, keep it quietly. If it lasts for more than half a minute, it means that the lungs are healthier. If it is less than 10 second, it is recommended to go to the hospital for professional lung function examination.
Blow out a candle or balloon
Light a candle and try to blow it out. If you leave your mouth 15 cm, it will not go out, indicating that there may be something wrong with your lung function. It's hard to blow a balloon. Even if it can't be blown up or broken, the lung function may be worse.
climb the stairs
Climb to the third floor at a leisurely speed. If you feel obvious shortness of breath and chest tightness, it means that your lung function may be abnormal.
4. Observation method
If cyanosis is found on the lips, the face is dull, and there are three concave signs in breathing (obvious depressions appear in the suprasternal fossa, supraclavicular fossa and intercostal space when inhaling), it indicates pulmonary insufficiency. I suggest you go to the hospital for relevant examination in time.
The above self-test actions are only used as a reference for a preliminary understanding of lung function. In order to get accurate and scientific results, it is necessary to check the lung function by testing instruments.